Method of melt kneading, extrudate, and transparent resin material

摘要

It is an object of the present invention to obtain an optically transparent nano-dispersed polymer blend extrudate and a transparent resin having a microscopic dispersion structure in which incompatible polymer blend is melted and kneaded, one of resins is formed into a matrix, a size of dispersed phase of the other resin is controlled to 300 nm or less, more preferably 100 nm or less. Extra additive such as a compatibilizer is not added. When the incompatible polymer blend is melted and kneaded using a high shearing and forming apparatus having an inner feedback type screw under a condition that the screw rotation speed is 600 rpm to 3000 rpm, the rotation speed of the inner feedback type screw is increased, the kneading time is set under constant rotation speed, the high shearing forming condition is adjusted, and a structure in which a size of dispersed phase is controlled to 300 nm or less, more preferably 100 nm or less is formed.

主权项

1. A melting and kneading method for producing a compatible nanostructured resin, wherein dispersed phases are uniformly dispersed in a matrix resin, comprising:
a supplying step of supplying at least two incompatible resins from a material supplying part into a melting and kneading part which includes a cylinder, a screw, the material supplying part and a heating part, wherein the at least two incompatible resins include at least a first resin and a second resin; and a melting and kneading step to make the compatible nanostructured resin by melting and kneading the incompatible resins, wherein a rotation speed of the screw is set into a range from 600 rpm to 3000 rpm, and a shear rate of the screw is set into a range from 900 to 4500 sec−1, wherein the dispersed phases have sizes of 300 nm or less, and wherein the first resin has a polycarbonate of 97 to 3 weight % and the second resin has a methacryl-based resin of 3 to 97 weight %.